"I knew immediately when the phone rang and I seen it was (Dave Markham), I knew it was not going to be good news," Rader said.

As during the search, Rader said the group is rallying around the family.

"We were there just as a support group, and then when we got the news yesterday or last night, that's when most of the team members actually gathered around him to give him the moral support he so needs right now," he said.

With several missing person cases in the area, from Paige Johnson and Lauren Spierer to Billy Disilvestro, Rader notes a group like EquuSearch provides additional resources at no cost to law enforcement to bring missing loved ones home.

“To be honest with you, I don't think the Ohio chapter would be where it is today if it wasn't for Katelyn. I mean most, 90 percent of the people that we have as members here came from Katelyn's searches,” he said.

Rader said that EquuSearch will be planning a memorial for Markham in the coming days.

Timeline of Katelyn Markham case

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August 13, 2011: Katelyn Markham is last seen at her Fairfield home, three days before her 22nd birthday.